It has come to my attention from my dealings
with Borders Australia and Kobo that some of the eBooks that they sell are only offered in a format that can be downloaded to the Kobo/Borders/??? desktop application, which can then only be transferred to a Kobo, or a device that supports the Desktop software.
It may not be obvious to some that this means that you will never, unless Kobo develop some conversion software or change/add availability of formats, be able to read your eBooks on any other eReader unless it's a Kobo or has the Kobo eBook Reader app available. This will be the only way you will be able to read it - if you don't like the Kobo eReader app, tough luck.
This is a terrible model - I can only suggest you think hard about this before purchasing any Kobo eBooks that are only available in the 'desktop' format.